Sometimes you don’t want other people to see what’s on your Windows desktop. Perhaps you work in an open office where certain programs contain sensitive or private information you’d rather not have to keep hiding from view. Or maybe you’re on the phone and don’t want your other half to see what present you’re spying for their birthday.

If, for whatever reason, you’d like to be able to obscure individual application windows then AntiSnooper is the tool to choose. It’s incredibly simple to use, effective and able to hide selected windows after a user-selected delay. With AntiSnooper running, just open the program in question – you should see it appear in the Windows Protection tab of AntiSnooper. Verify which window it refers to by clicking the highlight window button on the right, then click + to create a profile for that program.

First review and – if necessary – modify the profile name. Next, set a time-out in seconds – this is how long the window can remain unfocussed for before it’s obscured. Now choose your protection type: Window obscure simply blurs the window itself – use the dial to set the strength of the effect, while Windows ScreenSaver places a custom screensaver over the window in question – and other protection options include "Noise", "Blinds", "Mosaic", "Shift", "Splash" and "Halftone".

Click OK and the profile details are stored for future use (manage these from the Protected Profiles window) while protection is immediate. You can temporarily suspend any window protection via AntiSnooper’s main window – simply click the pause button.

You can also configure AntiSnooper to start automatically with Windows and minimise it to the System Tray so it’s invisible when in use.

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It's a simple way to hide background windows from view for privacy purposes while you're at your computer, but you'll still need to lock your desktop when moving away from your PC to keep those prying eyes at bay.